Rolling mill thickness gauge and traveling gear thereof

The utility model discloses a traveling gear for a rolling mill thickness gauge. The traveling gear comprises a rack (1), a gear (2) and a traveling motor (3), wherein the rack (1) is horizontally arranged; the gear (2) is meshed with the rack (1); the traveling motor (3) is used for driving the gear (2); and one of the rack (1) and the traveling motor (3) is fixed on a rolling mill rack (5), and the other of the rack (1) and the traveling motor (3) is fixed on the thickness gauge (5) of the rolling mill. According to the traveling gear for the rolling mill thickness gauge, the rolling mill thickness gauge (5) is driven by a gear-rack pair structure consisting of the rack (1) and the gear (2) to horizontally travel, so that the problem of traveling instability caused by the adoption of a cylinder-driven traveling mode in the prior art is effectively solved, the traveling characteristics of the rolling mill thickness gauge (5) are optimized, thickness measurement accuracy is improved, and the quality of the pr